kiistaton

Kiistaton is a Finnish adjective meaning undeniable or indisputable. It describes facts, claims, or conclusions that are beyond reasonable doubt or widely accepted as true. In formal writing, kiistaton conveys strong certainty, though it may imply normative judgment if overused.

Etymology: Kiistaton is formed from kiista, meaning dispute, with the suffix -ton, yielding the sense “without dispute” or “free of dispute.” The word is related to kiistanalainen (controversial) and kiista (a dispute). The adverb kiistottomasti exists to mean “undeniably,” but kiistaton is the more common adjective form.

Usage: Kiistaton is suitable for describing well-supported conclusions, widely corroborated evidence, or established facts. It is common in academic, legal, and journalistic Finnish, but can sound formal or lofty in everyday speech. Caution: overuse or applying kiistaton to highly debated topics can appear hyperbolic.

Example: On kiistaton tosiasia, että ilmastonmuutos etenee. (It is an undisputed fact that climate change is progressing.)

Related terms: kiistanalainen (controversial, disputed), kiista (dispute), kiistää (to deny).